TBM-7615-B Kollmorgen
Wake Industrial LLC is not an authorized distributor of this product.
Wake Industrial LLC is not an authorized distributor of this product.
The Kollmorgen TBM-7615-B is a frameless motor in the TBM Frameless Motors series with a rated power of 208 Watts and a rated speed of 2560 RPM. It delivers a continuous stall torque of 0.918 Newton-meters with a continuous stall current of 11.7 Arms and operates at 24 Volts DC. The motor features a peak stall torque of 2.22 Newton-meters and has 12 poles.
Internal Product Review
The TBM-7615-B is a Kollmorgen frameless motor rated for 208 W at 2560 RPM. Continuous stall torque of 0.918 N·m and peak stall torque of 2.22 N·m support very capable low-speed performance in compact servo assemblies. An excellent option for applications requiring efficient, precise direct-drive motion.
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Product Description:
The TBM-7615-B is a frameless permanent-magnet motor kit produced by Kollmorgen within the TBM Frameless Motors series. When integrated into a machine’s mechanical structure, the stator and rotor pair deliver direct-drive torque without belts or gear reductions, a layout that minimizes backlash in industrial automation axes such as gimbals, semiconductor stages, or collaborative robot joints. By allowing the rotor to mount directly to the load and the stator to fit into the housing, the assembly keeps weight low and improves dynamic response. This format also supports compact axis layouts where a conventional housed motor would add unnecessary length or coupling compliance.
Electrical performance is based on a supply of 24 VDC, from which the drive reaches a rated mechanical speed of 2560 RPM. At that operating point, the motor can deliver a continuous stall torque of 0.918 N·m while drawing a continuous stall current of 11.7 Arms. The back electromotive force is proportional to speed, with a constant of 4.89 Vrms/kRPM, which helps the drive estimate velocity during operation. Low copper losses are supported by a DC resistance of 0.2 Ω at 25 °C and an inductance of 0.2 mH that shapes current ripple during PWM modulation. The motor uses twelve magnetic poles, and its 0.081 N·m/Arms torque constant links commanded current to produced torque in closed-loop servo control.
During fast indexing or shock loads, the motor can move beyond its continuous operating range. It can reach a peak stall torque of 2.22 N·m when up to 29.4 Arms is applied for short periods, giving the axis extra force during acceleration. The active lamination stack supports a rated output of 208 W, and the lightweight rotor has an inertia of only 0.0000304 kg·m², which allows rapid speed changes with limited drive energy. Static friction is 0.032 N·m, so start-up torque margins remain modest, while viscous damping of 0.00605 N·m/kRPM helps stabilize velocity at higher speeds. This combination is useful in motion profiles with frequent starts, stops, and quick reversals.
